Who is Poonam's boyfriend?

Given the following information:
$(A)$ Gopal is shorter than Ashok but taller than Kunal;
$(B)$ Navin is shorter than Kunal;
$(C)$ Jayesh is taller than Navin;
$(D)$ Ashok is taller than Jayesh.
Which of the given statements is not necessary to determine the relative heights of all individuals?

In a shop,items are arranged on a shelf consisting of six rows. Biscuits are arranged above the tins of chocolates but below the rows of packets of chips. Cakes are at the bottom and the bottles of peppermints are below the chocolates. The topmost row has the display of jam bottles. Where exactly are the bottles of peppermints? Mention the place from the top.

Sitting in a row in front of a camera,$Mr. X$ is on the left of the person sitting in the centre but is on the right of $Mr. Y$. $Mr. P$ is on the right of $Mr. Z$ and $Mr. R$ is on the right of $Mr. P$. $Mr. R$ is the second person from the person sitting in the centre. Who is the person sitting in the centre?

Eight friends $A, B, C, D, E, F, G$ and $H$ are sitting in a circle facing the centre. $B$ is sitting between $G$ and $D$. $H$ is third to the left of $B$ and second to the right of $A$. $C$ is sitting between $A$ and $G$ and $B$ and $E$ are not sitting opposite to each other.
Who is third to the left of $D$?

$(A)$ $P, Q, R, S$ and $T$ are sitting in a circle facing the centre.
$(B)$ $R$ is immediate left of $T.$
$(C)$ $P$ is between $S$ and $T.$
Who is to the immediate left of $R$?